package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.constants.WmNewsMessageConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmNewsAuthDto;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.model.wemedia.vos.WmNewsAuthVO;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WMMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import com.heima.wemedia.service.WmUserService;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.buf.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {
    @Autowired
    private KafkaTemplate kafkaTemplate;

    /**
     * 条件查询文章列表
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findAll(WmNewsPageReqDto dto) {
        //1.检查参数
        if (dto == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检测
        dto.checkParam();
        //获取当前登录人的信息
        WmUser user = WmThreadLocalUtil.getUser();
        if (user == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
        }

        //2.分页条件检查
        IPage page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = Wrappers.<WmNews>lambdaQuery()
                //状态精确查询
                .eq(dto.getStatus() != null, WmNews::getStatus, dto.getStatus())
                //频道精确查询
                .eq(dto.getChannelId() != null, WmNews::getChannelId, dto.getChannelId())
                //时间范围查询
                .between(dto.getBeginPubDate() != null || dto.getEndPubDate() != null, WmNews::getPublishTime, dto.getBeginPubDate(), dto.getEndPubDate())
                //关键字模糊查询
                .like(dto.getKeyword() != null, WmNews::getTitle, dto.getKeyword())
                //查询当前登录用户的文章
                .eq(WmNews::getUserId, user.getId())
                //发布时间倒序查询
                .orderByDesc(WmNews::getCreatedTime);
        page = page(page,lambdaQueryWrapper);

        //3.结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int) page.getTotal());
        responseResult.setData(page.getRecords());
        return responseResult;
    }

    @Autowired
    private WmNewsAutoScanService wmNewsAutoScanService;

    @Autowired
    private WmNewsTaskService wmNewsTaskService;
    /**
     * 发布修改文章或保存为草稿
     * @param dto
     * @return
     */
    @Override
    @Transactional
    public ResponseResult submitNews(WmNewsDto dto) {
        //0.条件检查
        if (dto == null || dto.getContent() == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //1.保存或修改文章
        WmNews wmNews = new WmNews();
        //属性拷贝 属性名词和类型相同才能拷贝
        BeanUtils.copyProperties(dto,wmNews);
        //封面图片  list--->String
        if (dto.getImages() != null && dto.getImages().size() > 0) {
            //[1dddfsd.jpg,sdlfjldk.jpg]-->   1dddfsd.jpg,sdlfjldk.jpg
            String imageStr = StringUtils.join(dto.getImages(), ',');
            wmNews.setImages(imageStr);
        }
        //如果当前封面图片类型为自动 -1
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            wmNews.setType(null);
        }
        saveOrUpdateWmNews(wmNews);

        //2.判断是否为草稿  若为草稿结束当前方法
        if (dto.getStatus().equals(WmNews.Status.NORMAL.getCode())) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }
        //3.不是草稿，保存文章内容图片和素材的关系
        //获取到文章内容中的图片信息
        List<String> materials = extractUrlInfo(dto.getContent());
        saveRelativeInfoForContent(materials,wmNews.getId());
        //4.不是草稿，保存文章封面图片与素材的关系，若当前布局为自动，需要匹配封面图片
        saveRelativeInfoForCover(dto,wmNews,materials);

        //审核文章
        //wmNewsAutoScanService.autoScanWmNews(wmNews.getId());
        wmNewsTaskService.addNewsToTask(wmNews.getId(),wmNews.getPublishTime());

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    @Override
    public ResponseResult downOrUp(WmNewsDto dto) {

        //1.检查参数
        if(dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.查看文章
        WmNews wmNews = getById(dto.getId());
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"文章不存在");
        }

        //3.判断文章是否已发布
        if (!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"当前文章不是发布状态，不能上下架");
        }

        //4.修改文章enable
        if (dto.getEnable() != null && dto.getEnable() > -1 && dto.getEnable() <2) {
            update(Wrappers.<WmNews>lambdaUpdate().set(WmNews::getEnable,dto.getEnable())
                    .eq(WmNews::getId,dto.getId()));

            if (wmNews.getArticleId() != null) {
                Map<String, Object> map = new HashMap<>();
                map.put("articleId",wmNews.getArticleId());
                map.put("enable",dto.getEnable());
                kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC,JSON.toJSONString(map));
            }
        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);

    }

    /**
     * 第一个功能：如果当前封面类型为自动，则设置封面类型的数据
     * 匹配规则：
     * 1，如果内容图片大于等于1，小于3  单图  type 1
     * 2，如果内容图片大于等于3  多图  type 3
     * 3，如果内容没有图片，无图  type 0
     *
     * 第二个功能：保存封面图片与素材的关系
     * @param dto
     * @param wmNews
     * @param materials
     */
    private void saveRelativeInfoForCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();

        //若当前封面图片为自动，则设置为封面类型的数据
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            //多图
            if (materials.size() >= 3){
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images = materials.stream().limit(3).collect(Collectors.toList());
            }else if(materials.size() >=1 && materials.size() < 3) {
                //单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());
            }else {
                //无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);
            }

            //修改文章
            if (!images.isEmpty()) {
                wmNews.setImages(StringUtils.join(images,','));
            }
            updateById(wmNews);
        }

        if(images != null && !images.isEmpty()){
            saveRelativeInfo(images,wmNews.getId(),WemediaConstants.WM_COVER_REFERENCE);
        }
    }

    /**
     * 处理文章内容图片与素材的关系
     * @param materials
     * @param newsId
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer newsId) {
        saveRelativeInfo(materials,newsId,WemediaConstants.WM_CONTENT_REFERENCE);
    }


    @Autowired
    private WMMaterialMapper wMMaterialMapper;
    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;
    /**
     * 保存文章图片与素材的关系到数据库中
     * @param materials
     * @param newsId
     * @param type
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        if (materials == null || materials.isEmpty()) return;
        //通过图片url查询素材id
        LambdaQueryWrapper<WmMaterial> in = Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials);
        List<WmMaterial> dbMWmMaterials = wMMaterialMapper.selectList(in);

        //判断素材是否有效
        if (dbMWmMaterials == null || dbMWmMaterials.isEmpty()){
            //手动抛出异常   第一个功能：能够提示调用者素材失效了，第二个功能，进行数据的回滚
            throw  new CustomException(AppHttpCodeEnum.MATERIASL_REFERENCE_FAIL);
        }

        if (materials.size() != dbMWmMaterials.size()){
            throw  new CustomException(AppHttpCodeEnum.MATERIASL_REFERENCE_FAIL);
        }

        List<Integer> idList = dbMWmMaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());

        //批量保存
        wmNewsMaterialMapper.saveRelations(idList,newsId,type);
    }

    /**
     * 提取文章内容中的图片信息
     * @param content
     * @return
     */
    private List<String> extractUrlInfo(String content) {
        ArrayList<String> materials = new ArrayList<>();
        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps){
            if (map.get("type").equals("image")){
                String imageUrl = (String)map.get("value");
                materials.add(imageUrl);
            }
        }
        return materials;
    }


    /**
     * 保存或修改文章
     * @param wmNews
     */
    private void saveOrUpdateWmNews(WmNews wmNews) {
        //补全属性
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable((short) 1);   //默认上架
        if (wmNews.getId() == null){
            //保存
            save(wmNews);
        }else{
            //修改
            //删除文章图片与素材的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery()
                    .eq(WmNewsMaterial::getNewsId,wmNews.getId()));
            updateById(wmNews);
        }
    }

    @Autowired
    private WmNewsMapper wmNewsMapper;

    @Autowired
    private WmUserService wmUserService;

    @Override
    public ResponseResult loadNewsList(WmNewsAuthDto dto) {
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        // 创建 Page 对象
        Page<WmNews> page = new Page<>(dto.getPage(), dto.getSize());

        // 构建查询条件
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = Wrappers.<WmNews>lambdaQuery()
                // 状态精确查询
                .eq(dto.getStatus() != null, WmNews::getStatus, dto.getStatus())
                .like(dto.getTitle() != null,WmNews::getTitle,dto.getTitle())
                .orderByDesc(WmNews::getCreatedTime);

        IPage<WmNews> newsPage = wmNewsMapper.selectPage(page,lambdaQueryWrapper);

        /**
         * IPage泛型转换
         * convert 参数：
         *    转换函数
         *    return 转换泛型后的IPage
         */
        IPage<WmNewsAuthVO> newsAuthVOIPage = newsPage.convert(news -> {
            WmNewsAuthVO authVo = new WmNewsAuthVO();
            // 将 WmNews 的属性映射到 WmNewsAuthVO
            BeanUtils.copyProperties(news, authVo);
            // 设置 WmNewsAuthVO 的额外属性
            authVo.setAuthorName(wmUserService.getById(news.getUserId()).getName()); // 根据实际情况设置 name 属性
            return authVo;
        });
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int)newsAuthVOIPage.getTotal());
        responseResult.setData(newsAuthVOIPage.getRecords());

        /*
        //注意：该方法不能获取分页总数
        //分页参数检查
        dto.checkParam();
        int currentPage = dto.getPage();
        dto.setPage((currentPage -1) * dto.getSize());
        List<WmNewsAuthVO> listAndPage = wmNewsMapper.findListAndPage(dto);
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), listAndPage.size());
        responseResult.setData(listAndPage);*/
        return responseResult;
    }

    @Override
    public ResponseResult getNewsVOById(Integer id) {
        //参数检查
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        WmNews wmNews = getById(id);
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }

        WmNewsAuthVO newsAuthVO = new WmNewsAuthVO();
        BeanUtils.copyProperties(wmNews,newsAuthVO);
        WmUser wmUser = wmUserService.getById(wmNews.getUserId());
        if (wmNews != null) {
            newsAuthVO.setAuthorName(wmUser.getName());
        }

        return ResponseResult.okResult(newsAuthVO);
    }

    @Override
    public ResponseResult newAuthPass(WmNewsAuthDto dto) {
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        WmNews wmNews = getById(dto.getId());
        wmNews.setStatus(Short.valueOf(dto.getStatus().shortValue()));
        updateById(wmNews);

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    @Override
    public ResponseResult newAuthFail(WmNewsAuthDto dto) {

        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        WmNews wmNews = getById(dto.getId());
        wmNews.setStatus(Short.valueOf(dto.getStatus().shortValue()));
        wmNews.setReason(dto.getMsg());
        updateById(wmNews);

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

}
